From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: Leon Romanovsky <leon@kernel.org>
Cc: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Leon Romanovsky <leonro@nvidia.com>,
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Subject: Re: [PATCH net-next v1 1/5] devlink: Add missed notifications iterators
Date: Wed, 29 Sep 2021 13:29:37 +0000 [thread overview]
Message-ID: <20210929132936.hnts7lmweewqedxi@skbuf> (raw)
In-Reply-To: <2ed1159291f2a589b013914f2b60d8172fc525c1.1632916329.git.leonro@nvidia.com>
On Wed, Sep 29, 2021 at 03:00:42PM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@nvidia.com>
>
> The commit mentioned in Fixes line missed a couple of notifications that
> were registered before devlink_register() and should be delayed too.
>
> As such, the too early placed WARN_ON() check spotted it.
>
> WARNING: CPU: 1 PID: 6540 at net/core/devlink.c:5158 devlink_nl_region_notify+0x184/0x1e0 net/core/devlink.c:5158
> Modules linked in:
> CPU: 1 PID: 6540 Comm: syz-executor.0 Not tainted 5.15.0-rc2-syzkaller #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
> RIP: 0010:devlink_nl_region_notify+0x184/0x1e0 net/core/devlink.c:5158
> Code: 38 41 b8 c0 0c 00 00 31 d2 48 89 ee 4c 89 e7 e8 72 1a 26 00 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e e9 01 bd 41 fa
> e8 fc bc 41 fa <0f> 0b e9 f7 fe ff ff e8 f0 bc 41 fa 0f 0b eb da 4c 89 e7 e8 c4 18
> RSP: 0018:ffffc90002d6f658 EFLAGS: 00010293
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> RDX: ffff88801f08d580 RSI: ffffffff87344e94 RDI: 0000000000000003
> RBP: ffff88801ee42100 R08: 0000000000000000 R09: 0000000000000000
> R10: ffffffff87344d8a R11: 0000000000000000 R12: ffff88801c1dc000
> R13: 0000000000000000 R14: 000000000000002c R15: ffff88801c1dc070
> FS: 0000555555e8e400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000055dd7c590310 CR3: 0000000069a09000 CR4: 00000000003506e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
> devlink_region_create+0x39f/0x4c0 net/core/devlink.c:10327
> nsim_dev_dummy_region_init drivers/net/netdevsim/dev.c:481 [inline]
> nsim_dev_probe+0x5f6/0x1150 drivers/net/netdevsim/dev.c:1479
> call_driver_probe drivers/base/dd.c:517 [inline]
> really_probe+0x245/0xcc0 drivers/base/dd.c:596
> __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:751
> driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:781
> __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:898
> bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
> __device_attach+0x228/0x4a0 drivers/base/dd.c:969
> bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
> device_add+0xc35/0x21b0 drivers/base/core.c:3359
> nsim_bus_dev_new drivers/net/netdevsim/bus.c:435 [inline]
> new_device_store+0x48b/0x770 drivers/net/netdevsim/bus.c:302
> bus_attr_store+0x72/0xa0 drivers/base/bus.c:122
> sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139
> kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296
> call_write_iter include/linux/fs.h:2163 [inline]
> new_sync_write+0x429/0x660 fs/read_write.c:507
> vfs_write+0x7cf/0xae0 fs/read_write.c:594
> ksys_write+0x12d/0x250 fs/read_write.c:647
> do_syscall_x64 arch/x86/entry/common.c:50 [inline]
> do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
> entry_SYSCALL_64_after_hwframe+0x44/0xae
> RIP: 0033:0x7f328409d3ef
> Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01
> 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
> RSP: 002b:00007ffdc6851140 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f328409d3ef
> RDX: 0000000000000003 RSI: 00007ffdc6851190 RDI: 0000000000000004
> RBP: 0000000000000004 R08: 0000000000000000 R09: 00007ffdc68510e0
> R10: 0000000000000000 R11: 0000000000000293 R12: 00007f3284144971
> R13: 00007ffdc6851190 R14: 0000000000000000 R15: 00007ffdc6851860
>
> Fixes: 474053c980a0 ("devlink: Notify users when objects are accessible")
> Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
> ---
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
next prev parent reply other threads:[~2021-09-29 13:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-29 12:00 [PATCH net-next v1 0/5] Devlink reload and missed notifications fix Leon Romanovsky
2021-09-29 12:00 ` [PATCH net-next v1 1/5] devlink: Add missed notifications iterators Leon Romanovsky
2021-09-29 13:29 ` Vladimir Oltean [this message]
2021-09-29 12:00 ` [PATCH net-next v1 2/5] devlink: Allow modification of devlink ops Leon Romanovsky
2021-09-29 12:00 ` [PATCH net-next v1 3/5] devlink: Allow set specific ops callbacks dynamically Leon Romanovsky
2021-09-29 12:25 ` Greg Kroah-Hartman
2021-09-29 12:58 ` Leon Romanovsky
2021-09-29 12:00 ` [PATCH net-next v1 4/5] net/mlx5: Register separate reload devlink ops for multiport device Leon Romanovsky
2021-09-29 13:55 ` Jakub Kicinski
2021-09-29 14:16 ` Leon Romanovsky
2021-09-29 14:26 ` Jakub Kicinski
2021-09-29 14:31 ` Leon Romanovsky
2021-09-29 14:35 ` Jakub Kicinski
2021-09-29 15:24 ` Leon Romanovsky
2021-09-29 12:00 ` [PATCH net-next v1 5/5] devlink: Delete reload enable/disable interface Leon Romanovsky
2021-09-29 13:40 ` [PATCH net-next v1 0/5] Devlink reload and missed notifications fix Jakub Kicinski
2021-09-29 13:46 ` Vladimir Oltean
2021-09-29 13:56 ` Jakub Kicinski
2021-09-29 14:20 ` Leon Romanovsky
2021-09-29 14:13 ` Leon Romanovsky
2021-09-29 14:39 ` Jakub Kicinski
2021-09-29 15:31 ` Leon Romanovsky
2021-09-29 17:55 ` Jakub Kicinski
2021-09-29 19:11 ` Leon Romanovsky
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